“In order to know the true situation of a Planet at any particular time, the small set of balls are to be put each on its respective axis; then the winch to be turned round until each index points to the given time.”
Other David Rittenhouse Quotes
But Dr. Smith says, and I believe it to be a true state of the case, that he himself gave a course of Lectures in Natural Philosophy, during the same winter, and that the money raised by them was also applied towards paying for the Orrery.
David Rittenhouse 
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